package com.example.windweatherapp;

import static com.example.windweatherapp.constants.Constants.PROVINCE_URL;

import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Toast;


import androidx.fragment.app.Fragment;

import com.example.windweatherapp.databinding.ChooseAreaBinding;
import com.example.windweatherapp.db.City;
import com.example.windweatherapp.db.County;
import com.example.windweatherapp.db.Province;
import com.example.windweatherapp.util.HttpUtil;
import com.example.windweatherapp.util.Utility;

import org.jetbrains.annotations.NotNull;
import org.litepal.LitePal;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;


public class ChooseAreaFragment extends Fragment {
    public static final String PROVINCE = "province";
    public static final String CITY = "city";
    public static final String COUNTY = "county";
    ChooseAreaBinding binding;
    public static final int LEVEL_PROVINCE = 0; // 省级
    public static final int LEVEL_CITY = 1; // 市级
    public static final int LEVEL_COUNTY = 2; // 县级
    private int currentLevel = LEVEL_PROVINCE; // 当前显示的省级列表 currentLevel=0;
    List<Province> provinceList; // 省的集合数据
    List<City> cityList;
    List<County> countyList; // 县的集合

    private  Province selectedProvince;
    private City selectedCity; // 选中的城市信息

    List<String> dataList = new ArrayList<>();
    ArrayAdapter<String> adapter;

    ProgressDialog progressDialog; // 声明一个ProgressDialog对象


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        binding = ChooseAreaBinding.inflate(inflater, container, false);


        adapter = new ArrayAdapter<>(getActivity(), android.R.layout.simple_list_item_1, dataList);

        // 为列表组件设置适配器
        binding.listView.setAdapter(adapter);
        return binding.getRoot();
    }
    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        binding.listView.setOnItemClickListener((adapterView, view, position, id) -> {
            if(currentLevel==LEVEL_PROVINCE){
                selectedProvince=provinceList.get(position);//获取选中项（某个省份）
                queryCities();//查询城市
            } else if (currentLevel == LEVEL_CITY) {
                selectedCity = cityList.get(position); // 获取选中项（某个城市）
                queryCounties(); // 查询县
            } else if (currentLevel == LEVEL_COUNTY) {
                // 把当前的位置还有weatherId传过去  CNXXXX  --->XXXX
                County county = countyList.get(position);
                String spot = String.format("%s|%s|%s",
                        selectedProvince.getProvinceName(),
                        selectedCity.getCityName(),
                        county.getCountyName());
                String location = county.getWeatherId().substring(2);
                Log.d("test", "onActivityCreated: "+spot+"|"+location);


                Intent intent = new Intent(getActivity(), WeatherActivity.class);
                intent.putExtra("spot", spot);
                intent.putExtra("location", location);
                startActivity(intent);
                getActivity().finish();






            }
        });
        binding.backButton.setOnClickListener(v -> {
            if (currentLevel == LEVEL_CITY) {
                queryProvinces();
            } else if (currentLevel == LEVEL_COUNTY) {
                queryCities();
            }
        });
        queryProvinces(); // 查询省份
    }

    private void queryCounties() {
        binding.titleText.setText(selectedProvince.getProvinceName() + ":" + selectedCity.getCityName());
        binding.backButton.setVisibility(View.VISIBLE); // 有返回按钮，可以返回到上一级

// 访问数据库表
        countyList = LitePal.where("cityId=?", String.valueOf(selectedCity.getId())).find(County.class);

        if (countyList.size() > 0) {
            // 成功从数据库表中获取数据
            dataList.clear(); // 清除原来的所有数据
            countyList.forEach(item -> {
                dataList.add(item.getCountyName());
            });
            adapter.notifyDataSetChanged();
            binding.listView.setSelection(0);
            currentLevel = LEVEL_COUNTY;
        } else {
            // 数据库表是空表，发网络请求，获取数据，填充数据
            String url = PROVINCE_URL + "/" + selectedProvince.getProvinceCode()+ "/" + selectedCity.getCityCode();
            queryFromServer(url, COUNTY);
        }
    }

    private void queryCities() {
        binding.titleText.setText(selectedProvince.getProvinceName());
        binding.backButton.setVisibility(View.VISIBLE); // 有返回按钮

        cityList = LitePal.where("provinceId=?", String.valueOf(selectedProvince.getId())).find(City.class);
        if (cityList.size() > 0) {
            // 成功从数据库表中获取数据
            dataList.clear();// 清除原来的所有数据
            cityList.forEach(item -> {
                dataList.add(item.getCityName());
            });
            adapter.notifyDataSetChanged();
            binding.listView.setSelection(0);
            currentLevel = LEVEL_CITY;
        } else {
            // 数据库表是空表，发网络请求，获取数据，填充数据
            String url = PROVINCE_URL + "/" + selectedProvince.getProvinceCode();
            queryFromServer(url, CITY);
        }
    }

    private void queryProvinces() {
        // 如果没拿到，发起网络请求，拿数据存入库中，最后再去queryProvinces()
        binding.titleText.setText("中国(China)");
        binding.backButton.setVisibility(View.GONE); // 没有返回按钮

// 访问数据库表
        provinceList = LitePal.findAll(Province.class); // ctrl+alt+v
        if (provinceList.size() > 0) {
            // 成功从数据库表中获取数据
            dataList.clear(); // 清除原来的所有数据
            provinceList.forEach(item -> {
                dataList.add(item.getProvinceName());
            });
            adapter.notifyDataSetChanged();
            binding.listView.setSelection(0);
            currentLevel = LEVEL_PROVINCE;
        } else {
            // 数据库表是空表，发网络请求，获取数据，填充数据
            queryFromServer(PROVINCE_URL, PROVINCE);
        }
    }
    private void queryFromServer(String url, String type){
        Log.d("test", url);
        showProgressDialog();


        HttpUtil.sendOkHttpRequest(url, new Callback() {
            @Override
            public void onFailure(@NotNull Call call, @NotNull IOException e) {
                getActivity().runOnUiThread(() -> {
                    Toast.makeText(getContext(), "访问网络失败！", Toast.LENGTH_SHORT).show();
                    closeProgressDialog();
                });
            }

            @Override
            public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
                String strJson = response.body().string();//ctrl+alt+v
                Log.d("test", "onResponse: "+strJson);
                boolean result=false;
                if(PROVINCE.equals(type)){
                    result = Utility.handleProvinceResponse(strJson);//写入数据库表

            } else if (CITY.equals(type)) {
                result = Utility.handleCityResponse(strJson, selectedProvince.getId());
                } else if (COUNTY.equals(type)) {
                    result = Utility.handleCountyResponse(strJson, selectedCity.getId());
                }
                if(result) {
                    if (PROVINCE.equals(type)) {
                        getActivity().runOnUiThread(() -> {
                            queryProvinces();
                        });
                    } else if (CITY.equals(type)) {
                        getActivity().runOnUiThread(() -> {
                            queryCities();
                        });
                    } else if (COUNTY.equals(type)) {
                        getActivity().runOnUiThread(() -> {
                            queryCounties();
                        });
                    }
                    closeProgressDialog();
                } else {
                    getActivity().runOnUiThread(() -> {
                        Toast.makeText(getContext(), "数据解析失败", Toast.LENGTH_SHORT).show();
                        closeProgressDialog();
                    });
                }
            }
        });
    }

    private void closeProgressDialog() {
        if (progressDialog != null) {
            progressDialog.dismiss();
        }
    }

    private void showProgressDialog() {
        if (progressDialog == null) {
            // 创建对话框
            progressDialog = new ProgressDialog(getContext());
            progressDialog.setMessage("正在访问网络，请稍候！");
            progressDialog.setCancelable(false);
        }
        progressDialog.show();
    }
}